Turn A Trick Meaning

(chiefly US, idiomatic, of a prostitute) To perform a sexual service for a customer.

Example: 2007, Ajay Bhardwaj, "Laws put us at risk: hookers," Edmonton Sun (Canada), 22 Mar. (retrieved 18 Feb 2009):
  City prostitutes say laws governing the sex trade are putting them in danger every time they turn a trick.